DropDownList witrh Checkboxes: Howto get checked state of all items in angular2

[Holger Erne]

Hi,

I read quite a few times through the documentation and also checked the samples - I did not find any way to get the checked state of the list items. Also changing the check-state seems not to get reflected in the model...

If I understand correctly, the checkboxes should behave as "selected" - so a checked item would mean that the item is also selected...

Here is what I did:

<!-- HTML -->

<li><input id="dropdown1" ej-dropdownlist [dataSource]="filter" [fields]="filtersvalues" [showCheckbox]="true" [value]="flt_flags" (change)="onChange($event)"/></li>

     {{filter[0].selected}}
     {{filter[1].selected}}
     {{filter[2].selected}}

And the typescript side:

     filter: Array<Object> = [];
     filtersvalues: Object;

constructor() {
  this.filter = [
    {text: 'check 1', value: '1', selected: false },
    {text: 'check 2', value: '2', selected: false },
    {text: 'check 4', value: '4', selected: false }
  ];
  this.filtersvalues = { dataSource: this.filter, text: 'text', value: 'value', selected: 'selected' };

Could you please help here or provide a sample?

Thanks!

[Prince Oliver]

Hi Erne,   

  

Thank you for using Syncfusion products.   

  

In our dropdownlist, the selected field is for selecting the values on initial rendering load only. This will not change the selected field in the model. Please refer to the following UG link: https://help.syncfusion.com/api/js/ejdropdownlist#members:fields-selected 

  

Therefore, this will not update the data source once the value is changed. If you need to modify the selected field in the data source, you need to do it manually in the change event. Kindly refer to the following code snippet.   

onChange(event) 

    { 

       for(var i=0;i<this.filter.length;i++){ 

          this.filter[i].selected = false; 

        } 

        for(var i=0;i<event.model.selectedIndices.length;i++){ 

          this.filter[event.model.selectedIndices[i]].selected = true; 

        } 

 

    } 

Kindly refer to the following link for the sample: http://www.syncfusion.com/downloads/support/forum/131127/ze/angular2-DDL-Sample-595004129 

Regards, 

Prince 

[Holger Erne]

Hi Prince,

thank you very much - this exactly was the missing piece! Everything is now working.

Best regards!

[Karthikeyan Viswanathan]

Hi Erne,   

 

Thanks for the update.  

 

We are glad the suggestion helped you to achieve your requirement.  

 

Please let us know if you need further assistance.  

 

Regards,   

Karthikeyan V.